Analysis of Drought Characteristics of Jiyang Eare in Recent Fifty Years

Using the precipitation data of the National Agricultural Meteorological Station in Jiyang county Shandong province from 1962 to 2011, applying the method of mathematical statistics, according to the percentage of precipitation anomaly analysis drought change characteristics of Jiyang county, analyzed the precipitation of year, season, month and year distribution characteristics of seasonal variation. The results showed that, the annual and summer precipitation had a fluctuation increase trend, the increase rate of annual precipitation was 3.007 mm/10a, the increase rate of summer precipitation was 1.225 mm/10a. Finally, obtained the occurrence rules and reasons of drought and flood disaster in annual and the growth season, and put forward agriculture drought disaster countermeasures suggestions in Jiyang county.